Patents by Inventor Yoshiharu Tanabe

Yoshiharu Tanabe has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method of measuring packet network transmission delay and machine-readable recording medium storing a program for implementing the method
    Patent number: 6769029
    Abstract: A transmission delay measuring method used in a packet network includes the steps of: detecting by the use of first and second clocks, for each of first direction-data packets transmitted from a first terminal to a second terminal through the packet network, input and output time instants when each of the first direction-data packets enters and leaves the packet network, respectively; recording the input and the output time instants for the first direction-data packets as recorded input and recorded output time instants for the first direction-data packets; detecting by the use of the second and the first clocks, for each of second direction-data packets transmitted from the second terminal to the first terminal through the packet network, input and output time instants when each of the second direction-data packets enters and leaves the packet network, respectively; recording the input and the output time instants for the second direction-data packets as recorded input and recorded output time instants for t
    Type: Grant
    Filed: August 7, 2000
    Date of Patent: July 27, 2004
    Assignee: NEC Corporation
    Inventors: Yoshinaga Seki, Hidekazu Tanno, Yoshiharu Tanabe, Shinji Hasei, Yoshinao Nakazawa